Which one is not a natural factor for causing soil erosion?
Correct option is D. Deforestation
Soil erosion is the process of weathering of top layer of soil either due to natural factor or artificial factor. The natural factors are called as erosion agents. These include water, wind, ice. Water produces 4 types of erosion, namely splash erosion, sheet erosion, rill erosion, and gully erosion. Gully erosion occurs due to drainage of soil by surface water runoff. Rilling erosion is the erosion due to concentrated water running through little streamlets. Deforestation is the artificial or man-made factor for causing soil erosion.
Thus, the correct answer is 'Deforestation.'